Comments

It's a copy of dev->wwn. The copy was needed for non-qdevified
controllers, which lacked dev.
Note that pci_piix3_xen_ide_unplug() did not clear the copy (it only
cleared the copy of bs). Begs the question whether stale data could
have been used after unplug. As far as I can tell, the copy was used
only when the copy of bs was non-null, thus no bug there.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
hw/ide/core.c | 18 ++++++++----------
hw/ide/internal.h | 4 +---
hw/ide/qdev.c | 3 +--
3 files changed, 10 insertions(+), 15 deletions(-)